Bidspirit auction | Soviet Union - Stamps and

Soviet Union - Stamps and Postal History - 1930, Pioneers' Assembly 10k olive brown, perforation 10 variety, and Blast Furnace 28k dark violet, used on registered cover from Odessa to Germany, Dresden arrival marking, traces of mounts and minor wear at bottom, still F/VF and scarce franking, Est. $200-$250, Scott #411 var, 430